99% of all air particles which have been 0.3 microns or more substantial. This eliminates pathogens and allergens which can result in asthma, allergies, and various sensitivities, offering some reduction to people who is likely to be allergic to pet dander, pollen in the home, plus much more. HEPA falls http://arvadavacuum28371.blogofoto.com/25012684/not-known-details-about-arvada-vacuums